"Don Pearce" wrote in message
...
On Wed, 12 Dec 2012 16:39:06 -0000, "David B"
wrote:
"Don Pearce" wrote in message
...
On Wed, 12 Dec 2012 16:14:00 -0000, "David B"
wrote:
Hello,
Sorry for posting an off topic question but I know you all know your
electrics.
I'm trying to change some light switches for PIW switches so they come
on
when my disabled brother walks into the room.
My problem is that the PIW switches require a live in, a live out and
a
neutral and light switches in the UK only have a live in and a
neutral.
Can I connect the live out to the neutral as well as the neutral to
the
neutral as shown inn my diagram he
http://www.flickr.com/photos/4905729...in/photostream
The crossed out line is what don't have and want to replace with the
dashed
line.
Being as the switch controller is drawing such a low current will this
make
any difference to the outcome? Will they now be in series rather than
parallel and would this matter?
Thank you
David
Uk light switches have a permanent live in and a switched live out -
no neutral. You will need to run new cabling to the switch for this
job.
d
Sorry, my terminology was wrong. Yes I really need one more cable as
shown
crossed out in the diagram but why wouldn't it work anyway? (Excuse my
ignorance)
As far as I can see, in the off position it would be the same as having a
0.25A fuse in line with the controller (which should make no odds) and in
the on position the switch and bulb would be in series.
Would this not work?
D
\do you think you could redraw the diagrams? It isn't clear what is
going on as they stand. The first one shows the controller being
bypassed by the switch. That says to me that the light can never be
turned off. That is not allowed. In the second diagram nothing at all
would happen because nothing is connected to anything else.
d
I will do tomorrow.
Ignore the diagram where the black lines came out white.
The PIW movement sensor is all shown in blue, the controller controls the
switch.
I want to use the switched live out as the neutral.
D